Hi All, The Programmable Real-Time Unit and Industrial Communication Subsystem (PRU-ICSS or simply PRUSS) on various TI SoCs consists of dual 32-bit RISC cores (Programmable Real-Time Units, or PRUs) for program execution. There are 3 foundation component for PRUSS subsystem: the PRUSS platform driver, the PRUSS INTC driver and the PRUSS remoteproc driver. Two first were already merged and can be found under: 1) drivers/soc/ti/pruss.c Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml 2) drivers/irqchip/irq-pruss-intc.c Documentation/devicetree/bindings/interrupt-controller/ti,pruss-intc.yaml The third one [1] was accepted and applied to andersson/remoteproc.git (refs/heads/for-next): [2] but is not merged yet. The programmable nature of the PRUs provide flexibility to implement custom peripheral interfaces, fast real-time responses, or specialized data handling. Example of a PRU consumer drivers will be: - Software UART over PRUSS - PRU-ICSS Ethernet EMAC In order to make usage of common PRU resources and allow the consumer drivers to configure the PRU hardware for specific usage the PRU API is introduced. This patch set depends on not merged (but applied to remoteproc/for-next) PRUSS remoteproc driver [1][2] and two remoteproc related patches [3] and [4]. [1] https://patchwork.kernel.org/project/linux-arm-kernel/cover/20201208141002.17777-1-grzegorz.jaszczyk@xxxxxxxxxx/ [2] https://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc.git/commit/?h=for-next&id=b44786c9bdc46eac8388843f0a6116369cb18bca [3] https://patchwork.kernel.org/project/linux-remoteproc/patch/20201121032042.6195-1-s-anna@xxxxxx/ [4] https://patchwork.kernel.org/project/linux-remoteproc/patch/20201121030156.22857-3-s-anna@xxxxxx/ Best regards, Grzegorz Roger Quadros (1): remoteproc: pru: Add pru_rproc_set_ctable() function Suman Anna (2): dt-bindings: remoteproc: Add PRU consumer bindings remoteproc: pru: Deny rproc sysfs ops for PRU client driven boots Tero Kristo (2): remoteproc: pru: Add APIs to get and put the PRU cores remoteproc: pru: Configure firmware based on client setup .../bindings/remoteproc/ti,pru-consumer.yaml | 64 +++++ drivers/remoteproc/pru_rproc.c | 221 +++++++++++++++++- include/linux/pruss.h | 78 +++++++ 3 files changed, 360 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/remoteproc/ti,pru-consumer.yaml create mode 100644 include/linux/pruss.h -- 2.29.0
